"The cooperation between Iran and the agency has been progressive and is advancing forward," Afkham told reporters commenting on the Sunday visit of the head of the International Atomic Energy Agency (IAEA) Yukiya Amano to Iran.

Iran and the IAEA has agreed on a roadmap on the basis of which talks are continuing to remove the ambiguities, she said, adding that Iran is determined to cooperate with the IAEA.

"We hope the talks will advance in a technical and legal atmosphere to solve the issues one-by-one," she said.

On Monday, Amano told reporters in Vienna that out of the five practical measures within a cooperation framework, work had begun on two issues relating to possible military dimensions (PMDs) of Tehran's nuclear program, which were to be taken by an Aug. 25 deadline.

Under the cooperation agreement between Iran and the IAEA signed last November, Iran in May started to resolve PMD issues by providing the IAEA with the information of the reasons for developing exploding bridge wire detonators (EBW) which can be used to set off an atomic explosive device and also be applied for civilian purposes.

Amano also said his visit to Iran was "a useful one," stressing he was glad to hear a firm commitment from Iran to resolving all present and past issues through dialogue and cooperation with the IAEA.